(1-1/2)*(1-1/3)*(1-1/4)*...*(1-1/99)*(1-1/100)=
(1-1/2)(1-1/3)(1-1/4).(1-1/99)(1-1/100)等于?
1*2/1+2*3/1+3*4/1+.98*99/1+99*100/1=?
(-1*1\2)+(-1\2*1\3)+(-1\3*1\4)+.+(-1\99*1\100)
(1/100-1)(1/99-1)(1/98-1)(1/97-1).(1/3-1)(1/2-1)=
1;(1-1/2^2)(1-1/3^2)(1-1/4^2)````````````(1-1/99^2)(1-1/100^
(1+1/1*3)*(1+1/2*4)*(1+1/3*5).(1+1/98*100)*(1+1/99*101)
(1+1/1+3)*(1+1/2*4)*(1+1/3*5)*.*(1+1/98*100)*(1+1/99*101)
1/1×2+1/2×3+1/3×4+1/4×5+.+1/98×99+1/99×100=?
1/1*2+1/2*3+1/3*4+1/4*5+.1/98*99+1/99*100=?
(1/100-1)(1/99-1).(1/3-1)(1/2-1)=?
|1/3-1/2|+|1/4-1/3|+|1/5+1/4|+...+|1/100-1/99|=?有谁能解急
1/1*2+1/2*3+1/3*4+1/4*5.1/99*100=